chilango
Hypothetical Wanker
Hundred odd
As said you can get a pretty good or a pretty big tent for that money.
Half that would get you an okay pop up tent.
Don't go too cheap though. Features like ventilation cost.
Single skin tents are best avoided unless its a high spec one to be used at high altitude, otherwise the chances of condensation forming on the inside are high.
If you decide against a pop up I'd stick to a dome shape really. Easy to erect and you don't have to worry too much about getting the guy lines right. It'll stand up without them. Other shapes often need you to get the guying right for stability and to get the fly lifted away from the inner.
If you can get a tent that pitches "all in one" (I.e. the fly and Inner are already attached) that makes life even easier too.