Fair asking price for various items?

Have 3 used standard faucets I plan on selling in the near future. I see new prices all over the place and was wondering what a fair, but semi-profitable asking price would be for the used ones.

I also have one of the older model 6.5 gal conicals that is going on the market as well. It has been upgraded with a thermometer and I also added a stainless ball valve to the upper port and replaced the lower ball valve. Any price suggestions would be welcome.

Thanks for the help and I'll post a sale link soon.

If they are in good condition then half of retail should be fair, at least for the faucets. For the conical, I'd go half of the cost of the fermenter plus what you put into it.

According to eBay, standard faucets run about $13-16 and Perlicks $30.

beer faucets, Business Industrial, Collectibles items on eBay.com

If I remember correctly new ones go for $10-12 at my LHBS.