FEG's Hipower copy was call the the PJK9HP, it takes all standard hi-power mags and parts. Fit and finish isn't as pretty but they shoot really well. New price on these is just over $225 in the shotgun news.
The DOUBLE action model is a modified Smith and wesson action that looks like a hi-power. The decocker is slide mounted and the grip is nearly vertical. It was advertised as having a 14 shot magazine. (as opposed to the hi powers 13) Its designation is usually P9R. They take smith and wesson mags if i recall and price runs around $250 new.
Depending on your market, $300 may be a little high for this pistol, esp. if its used.
FEG makes SOLID arms.. thay may not be pretty, but they work really well. I have a single acion Hi-Power copy (PJK9HP) in 9mm and a PA 63 (double action) in .380. Niether is especially pretty, but I'd shoot either against the original browning or a walther's that they copy. FEG also made the BEST AK variant on the market, the SA-85 M. Fit and finish was far supierior to the chinese, egyptian, bulgarian, and romanian rifles on the market. the latest importable version is called the SA 2000 M, I have not seen this variant up close but it now ships with a choate stock instead of a the rich blonde wood of the sa85M.
Hope this answers some of your questions.
Dr.Rob