Is that a bolt on handguard retainer or a military one? Saiga OEM rear sight or military? What bullet guide was used, and how was it installed, with a rivet or a screw? Hell, from the picture it looks like there is no bulletguide at all; which would mean either it takes modified mags, which is fixable, or they welded one in, which is an immediate pass.
Looks like a $500 or so conversion from the pics, assuming a proper bullet guide magazine conversion, US furniture/pistol grip conversion, no holes welded up, reused the trigger guard and selector. If they riveted in the bullet guide, and used a military handguard retainer and rear sight I'd say closer to $600. It does have dimples, which were rare but seems like there are a lot with dimples nowadays ('bout f'ing time).