Hi
Getting to you rather late on this, sorry.
Breaking it up takes time, do you have that?
Selling it as one lot you most times lose money, if you can afford that.
I like
ebay myself, bigger audience, but there are the fees to consider.
Delcampe is worldwide also, less fees, improving all the time, but not so well known in North America (except Quebec).
Even with a populatrtopic people have other things to do with their money sometimes.
If certain stamps are worth something then do not start them at 99c but at a reasonable price 25% - 50% of catalogue perhaps.
Use all the correct words to entitle your lots (lot) or no one will find it to bid on. Lots of people use searching now, either on
ebay or on Google or others.