Joined: Jun 2012
Posts: 1,881
Likes: 188
From: Colorado
Bikes: '91 Mtn Tek Vertical, '74 Raleigh Sports, '72 Raleigh Twenty, '84 Univega Gran Turismo, '09 Surly Karate Monkey, '92 Burley Rock-n-Roll, '86 Miyata 310, '76 Raleigh Shopper
It'll probably say what model it is on the top tube, if it's possible to see it in the photos.
Juvela's right...stem shifters typically indicate a lower model of bike. However, Univega bikes are generally decent bikes to start with, so depending on the price it might be worth looking at.