Hi Boobhops,
Don't spend a packet. You can get a prefectly good acoustic or electric for under £100. You will get better, quicker on an acoustic. With an acoustic there is no mucking around dragging the amp out, plugging in and then faffing around with the knobs. Acoustic - no knobs! Easy. Just check on the guitars you look at that it can be tuned and stay in tune. Don't be fooled by a salesman telling you the strings are shot - if it won't hold tune- it's f**ked! So buy a tumer for £10 and tune it up. Then, with it in tune, check the harmonics. TO do this you damp a string over the 12th fret and pluck the string. It should ring like a bell, and more importantly, the tuner should still be reading perfect tune. If it doesn't, the set up is wrong. On an acoustic with no bridge adjustment, walk away. If the harmonics are ok, then play every note on every fret and check for clean action and no buzzing. If all is good, offer 10% less than the asking price! Good luck. And remember,there are more guitars in the world than there will ever be guitar buyers -so don't buy any shit!!!