Depending on your target audience I think it makes sense to sell in that audience's currency.
Personally, I don't mind any currency, but many do not wish to pay the 2.5% PayPal exchange fee. Many want to purchase in their own currency.
In Canada here I started off in Canadian dollars but I found that my biggest market, people in the US, did not enjoy at all paying in other currencies. Either they did not bid, or were confused by the exchange rate and whole process of the thing.
The idea is to make it as painless as possible for the buyer to give you his money. If that means selling in USD and you having to pay the 2.5% exchange fee, well so be it. Include the fee in your price, and your shipping price also, put that in USD.
Long time eBayers usually do not mind the exchange business, but there are quite a few savvy purchasers out there. I have had people pay after they waited a few days for the exchange rate to move in their favour. Really.
Not taking returns is understandable but does not inspire confidence in the buyer's mind. Take 30 days returns or even say you take 7 days and figure it out in your finances that you have to leave the money in PayPal for 30 - 45 days or more because the buyer's can get their money back through PayPal whether you want them to or not. Nobody likes it but that's the facts.
Make it seem nice and trustworthy (how it presents) to the buyer.
Nowadays you have lots of room in the Title so use in for some words that may catch a passing searcher. And people do search now. Over half of people use the search function.
Say the year, the word Imperf, don't just say V/G but VG-F and spell out those words in the description.
Say Jacques Cartier, the full name and the denomination of the stamp, 10c.
Take out the 'Good CV' in the title. You can put that in the description. People know in their own heads what they are going to pay for something before they look at your listing and you telling them what the catalogue value is may be good for a side reference but that's all.
The word Good in the title leads buyers to think, oh, the stamp is good. It is better to Not state the grading on a stamp. To some buyers this stamp will be AOK, but to others it might seem below their expectation of what they would like to have.
Grading is mostly subjective so let them do the grading mostly. Any suggestion by you of whether the stamp is really good or beautiful or wonderful or anything of your opinion in there at all will affect how people look at the listing and sometimes it gets them thinking that they don't like your ideas. Don't get them going that way.
Just state the facts, and it is best to state what exactly is wrong or right with the stamp. In the description. Tell people about the thin, whether small, hardly noticeable, etc, but keep it factual. Tell them about the side partially cut into. Really. That is if there is a thin, maybe you meant the margin is thinner on that one side?
Tell them about the blue (deep blue?, royal blue?) pen cancel but tell it like it is a good thing and adds value to the stamp. It is a benefit (or feature) to have the excellent royal blue ink pen hand cancellation. You see?
All that extra describing helps buyers to see that you are honest (which you should be) and trustworthy (worthy of a higher payment than non-trustworthy folks) and that you care and friends care for friends (unwritten statement assumed by buyer).
You want to sell and continue to sell then your name is all important. Your reputation. Even on
ebay.
Suggested title (my opinion only of course):
Canada 1952 SC #7, 10c Jacques Cartier Imperf Stamp Used Pen CancelAlso repeat this information in your description. Really.
(The Year might need changing, I might have that wrong.)
Has this been checked for a stitch watermark? If so say it has one or no. Simply say No stitch watermark present. You saying this makes it official and adds to your expertise and trustworthiness in a way also.
Is it thin or thick paper? Any re-entries?
I agree totally on Bee See's suggestion of including a scan of the back. 200 dpi and then reduce it down a bit and use a photo editing program (perhaps Google Picassa) that allows you to rotate the stamp by a few degrees at a time to straighten it up.
Rule on
ebay, when you include more pics other than the first one, it increases you chance of a sale by 17%. That's big enough for me.
Please don not use the word Rare anywhere. Use a different word and then only if their is something special about this stamp. Like a reentry or something and then use the reentry word as people will search for that or that will grab their attention.
Take out the PayPal Only Please. I know it's polite and all that but if I want to know payment details I will click on the shipping tab. Don't mess up your presentation by telling people what they can't do. Tell them what they can do. Buy your stamp.
Say Thank You for Viewing This Item. DON'T USE CAPITALS Please. I know people say it is attention grabbing and it does do that but I don't feel it is in a good way.
Be friendly, professional and businesslike.
A side note, don't go all fancy with fonts and colours. That seems like a good idea to some but I think it just messes up the points you are trying to make. Keep it simple.
Say something like this in every listing:
Quote:
The stamp displayed in the above scans is the actual stamp offered for purchase. The stock sheets shown in the scans are for display purposes only and are not included in this auction item's contents.
That is a very nice request to commit and purchase, veiled in a nice statement that people like to see about what you see is what you get (don't say it that way!). Put it in a smaller font size than the rest so it doesn't stand out too much.
Picture is OK but I haven't seen alternate scans to compare. I noticed that the stamp is tilted to the right, using the top edge as a guideline in this. For some reason that makes people subconsciously get really serious with whatever they are looking at. Tilt it a tad to the left and the whole left brain / right brain thinking and image processing changes to hey, that's a nice stamp (or whatever). Believe it or not (most don't believe me, but try it).
There is, I believe, a lot more to selling a stamp on
ebay than meets the eye.
All the above given in a well meant fashion. It's what I would do, on a good day.

Oh, you can also say at the bottom, something like Good Luck Bidding or such like.
Good Luck Listing!