Used modern stamps? They are hard to find!
Here's what I like to do. I sell stuff on
ebay. Usually larger items which ship in boxes instead of envelopes.
When an item sells and I can reasonably ship by USPS (like, Federal Express isn't substantially cheaper), then I'll ask the buyer if they'd be willing to return the stamps I use on the package in a stamped return envelope I'd include in the package. If they say they will, I'll use lots of stamps on the package and send the envelope with instructions for removal. If not, I'll just use a meter strip (or the "label" that
ebay sells).
I've gotten entire sheets neatly cancelled (my postal clerk at the small P.O. I use lets me cancel with her red CDS. I've tried to talk her into a black ink device, but she don't want to get one.) as well as plenty of nice used singles.
I paste the stamps to typing paper which I tape at the edges to the package. The recipient simply cuts the taped edges, folds between the stamps and mails to me.
Perhaps you could try this if you sell on
ebay or elsewhere or otherwise ship to customers. Does Canada allow stamps to pay postage on packages? I know they were putting out hi-val stamps like the $10 Whale recently.
Even if you don't sell, if you ship gifts to family and friends this holiday season, maybe ask the recipients if they'll do this for you. Go to a smaller Post Office if you don't already and build a relationship with the clerk(s) there. They might let YOU hit those recent Canadian issues with the rectangular canceller. Would you call that a(n) RDS??!! :-} :-} :-} I wish the US had something like that :-}
Please give this a try!
Josh