I've got a Harris Bipod that I'm not using. It's a model 25C, which extends from 13.5" to 27". This is the solid mount, not the swivel. I bought it about six months ago. I've taken it out in the field two or three times, but other than that it has just sat in the safe. It's in very good condition. These go for $80 new plus shipping.
Price is $50 shipped via USPS Priority Mail. Check or money order only.