I think for your money, Astrein, you would get the best value with a higher quality vintage bike. Nothing wrong with BD bikes, but for two or three hundred bucks, you're likely to get a lot more with a vintage. Just try and find one that has 700c wheels, so you won't have to search for special and more expensive tires, etc.
Hint: Any time you see those "suicide levers" [The levers that come out of the side of the brake levers, for use when your hands are on the tops of the bars] it's usually a tell-tale sign that it's a low-end department store-type bike.
For a few hunnert bucks, you should be able to get something from the late 80's or early to mid 90's- which will make life a lot easier when/if parts and maintenance items are needed, as opposed to bikes from the 70's; which I think is what that Univega is. Good bikes from the 70's can be great too; you just need to know what you're getting into.