Fistly, unless you're car camping or very very small then you'll probably find a 2 man tent a tad cramped. Go for a 3 man if you can.
Do a search on ebay for Vango 3 man tent or similar so you get something of reasonable quality secondhand which will last much longer than a new cheap tent and be better too of curse. Naturally there are other quality brands too such as Coleman but you could spend all day searching teh brands.
And, if its' quality and you're not keeping it, selling it on will be a piece of cake.
Alternatively, can you borrow some kit for just one night?