Not only does it appear to be NFR, it's also one of the brighter-screen versions. At the very least, I'd guess $50 or so, probably closer to $60-$70.
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AGS-101 are easily going for $70 on eBay right now. I just found one on Craigslist for $30 and jumped on that right away b/c it was so cheap. That also looks like it's in surprisingly (!) good condition for a kiosk unit. With the additional NFR sticker, maybe someone would pay $80-90.