Look at a regulated AEA Challenger 22, 25 or 30. (BinTac, PelletShop, FoxAirPower, Utah)
I'm not anti-Hatsan or anything, but the AEA offering is better, cheaper and several years newer.
They will both be somewhat rough around the edges, but the AEA will likely outperform. It's also 3 or 4 pounds lighter.
Umarex Guantlet 30 is another one to consider on a "BT65 budget". Maxing out at 120 fpe versus 75 fpe for the BT65. Also probably better in most ways.
BT65 is getting up there in age and surpassed by newer offerings from Hatsan included.