OK, traditionally we don't comment on the pricing in the garage sale posts (except for the alerts section).
If you want to question pricing, it is polite to do that in a PM.
People can ask whatever they want. If you are interested, try to work something out.
If you aren't interested, move along and don't detract from a potential sale.
Do mods add value? It depends on who is buying. Again, a great comment for a PM.
I would post them on Craigslist as well. You may get lowball offers, but who cares.
It only take one buyer.
Good luck with your sale.