Yeah, I agree $10 is a little low for an opened CIB copy. I would say perhaps $15 for the first game, and $20 for the others.
I think you can get $50 or so for the opened CIB copies. For the sealed copies, maybe get around $10 per copy...So maybe between $70-$80 for the first three games.
I suggest this: make a mean out of every price you see under the COMPLETED listings that follow the condition your items follow. For example, check sealed completed items for the first Castlevania, take all prices and divide that by the number of copies. You now have an average price. I do this whenever I do a bid. Sometimes, the price might be very high because of desperate ebayers...other times it goes way too low. Other times, it's just right... (I sound like a story book here
)
EDIT: Just realized you mentioned the average thing above.
Sorry about that.
Eventually you will find a sale. I suggest advertising like mad around the 'net. It usually helps achieve your desired goal (like that Spiderman that went for $75 for SMS...WOWZERS! It usually goes for like $35!)
Wish you luck, though.
Ok I was bored and calculated averages for the sames according to succesfull completed listings on Ebay:
Aria of Sorrow................$24.6825
Harmony of Dissonance....$31.402
Circle of the Moon...........$18.594
Total average.................$74.6785
You can put the CIB opened copies for $75...maybe with free shipping to entice a sale.
For sealed copies, maybe reach $100 with free shipping.
I am NOT including the GBA remake/port of the NES game.