You can put things on ebay with both auction bids and a buy it now price.
Set the reserve at the minimum you'll take for them and the buy it now option will remain active until the reserve is met, which will allow someone who really wants them to impulse buy. As soon as someone bids over the reserve, the buy it now will disappear.
One thing to consider, though, is that with just a buy it now, you can set the options to make the buyer pay as soon as they click the buy it now button or your item will remain listed. That way you won't get ghost bidders who outbid everyone else in the auction then vanish.
Good luck selling them
