You will probably not find anyone in this forum who will suggest you convert that to a fixed gear
nice score for $190.. ride it and enjoy it! Tange 2 frame and a mix of Shimano 105 and 600 components for that price is definitely a good deal.
if you want a fixed gear bike, keep this one geared and look for a dedicated FGSS frame is my recommendation. you can buy brand new fixed gear bikes these days for less than you can convert them
ps... LOVE that paint job..