Hi Zinak,
I'm happy to hear that you're selling more teams.
Here are a few ideas from me:
*Always use both bloodbowl and blood bowl in the item description. Not everybody thinks to check both spellings.
*Close-up pictures are more important than full team photos. We want to see the painting standard.
*Make the teams available to both USA and Europe. Forgetting about Europe loses you a lot of potential buyers.
*If possible make 16 player teams. That will make your team more appealing to coaches who play in leagues (like myself).
*Also, paint full quota of position players - people who buy painted teams can rarely (be bothered) paint an extra mini or 2 themselves to your standard.
I've been watching ebay for 6-12 months now, and for some reason skaven and undead are most often for sale. That lowers the price. I was quite surprised to see your skaven team get so much. I guess that means that there are always buyers for quality stuff
Teams that are very rarely seen (and might therefore fetch a high price (?)) are:
wood elfs (but then again, the official team is so ugly)
gobbos/halflings (but there may not be many buyers for those)
amazon
lizardmen
khemri
necro
rotters (but note that a new line-up has been announced in the vault).
ogres
Like Valen, I'd be interested in Ogres. (+ skaven, amazon and necro).
Please note that it is very likely (but not guaranteed I guess) that the official ogre line-up will change. This may or may not impact your chances of selling.
(The old ogre team is 0-12 ogres, fill up with gobbos. The new one is 0-6 ogres, full up with snotlings - and I guess most coaches would be happy to use gnoblars as proxies.)
Good luck driving the bidding beyond my range
Cheers
Martin