Great. I just typed a lengthy answer, and lost it before it posted. Here's the short version...
There is no "inwall HT Gold." I have no idea what it is, and even if I did, they would probably need new grills and frames (could be $220 for the pair.) Get me more info and I'll try to help.
If they are used InWall Gold LCRs, there were two versions. One required 10" of stud depth, and they other one required 6" of stud depth. The 10" deep one actually rotated to aim the dispersion control lens at the listener. If the speaker is 4" deep, it may be a Gold Satellite, which is lower in sensitivity, sounds great, and doesn't play all that loud. I would look at new Triads; either the InWall Bronze/4 LCR at $650 each in any color with a 10 year warranty, or the InWall Mini/4 LCR at $500 each.
Used speakers are risky, which is why they're cheap. They may be damaged, misrepresented, the wrong model, fifteen years old, whatever. I get at least one PM a month from a forum member who jumped on a deal from a private party or unauthorized *dealer* and got the wrong stuff.
Try to get me more info on this "inwall HT Gold" and I'll try to help you.
aka TRIAD DUDE
I can tell people who are judgmental just by looking at them...