Hey nick... it'd be worth getting some better pics (or something that's zoomable at least)... The primary concerns I have are:
1. With a shimano 105 crankset it should have stock 3/32" ramps on the chainring. SInce he has "black chain" listed, this could actually be a 3/32" chain, but it could also be a KMC colored (z415?) chain which would be 1/8" chain. No biggie... cuz 1/8" chains will work with 3/32" chainrings, buuut... since the 105 is ramped, if you're chainline isn't perfect... it might throw the chain in a fixed setup.
2. He has pedals listed as "clipins" (the look pedals) but they are actually clipless (clips are the basket and clip system of the late 80's and earlier). ClipLESS pedals are what are pictured on the bike (the looks) which would require looks specific cleat, which I probably wouldn't commute in because they are hard to walk in, and wear down VERY quickly. You could obv just put ur pedals ur using now though.
3. I'm not certain that those are "Velocity Deep V's" or if they're the cheaper Alex rims. Not that big of a deal, but we're talking about a quality wheelset/hub combo (velocity) at about $300 retail compared to a decent rim with ok spokes, and a crappy hubset (alex rims) for about $90-$150 retail.
4. He refers to it as a single speed which is different than a fixed gear. Ask if the hubs are flip flop or single only, or fixed only, and what it comes setup as (actually it says flip flop) so ask what it comes setup as, single or fixes, and ask what gearing he has it running (looks like 39 up front and a 15 in the back?).
5. He says the frame is a Raleigh frameset that he custom painted. It's REALLY hard to tell from the photos but it appears to be a 27" frame (meaning it took 27" wheels) which would put it in an early 90's or later category. Raleigh would've been making those frames out of lugged steel, and I can't see any lugwork (cuz the pictures are abstract). The things I'd be cautious of... 1. If he re-painted it... why? Rust?, and how bad is/was it? How professional is the paintjob? 2. Is there any way to prove it's a Raleigh? If not... the price should come down. 3. SInce it's a 27" frame with a carbon fork, the fork is probably designed for 700c wheels (which those are) and the frame is designed for 27" wheels. This is why there's a TON of wheel clearance at the back. So the bike is going to have a very very VERY slight forward stance. This isn't an issue really... but where's the regular fork? I'm sure he ditched it because running 700c wheels on a 27" frame requires SUPER long reach brakes which are by the way SUPER expensive. Also... the rake might be weird which would make the handling super squirrely.
So... you'll be getting a bike with an incomplete frameset, a crank without all the parts, and it's all been custom painted. It was probably a road bike so the chainline might be wacky, and he's got a 700c fork on the front of a 27" bike. The bike looks nice though if you're ok with that.
I'd ask him for full measurements (like top tube, seat tube (center to center)) and a drive side picture of the crankset and the rear hub area that shows the rear dropouts. I'd also ask to see some pics of some part of the frame that would have lugwork like the place where the seattube and the top tube meet.
All that said... I don't think this bike (esPECIALLY repainted) is worth $350. It doesn't really have anything on it (except the wheelset) that is specifically designed for "fixed gearing". It's basically a spare parts build... You'd probably be able to pay $200 for it irl. Fill us in more on what you're looking for and we can help locate some good stuff. You can also checkout bikesdirect.com if you haven't and you're just looking for something basic... and if you haven't you might wanna checkout wrenchscience.com (create an account and go to their fit kit stuff) you'll get a good ESTIMATE of what size bike you should be after?
