I sell them and the ones at Lowes or Home depot are usually 9 or 10,000 btu and if you want a good one buy a 12000btu if you want one P. M. me and I can set you up with place near you and about how much you can expect to pay.
Some units have to be drained of condensation all the time but the good ones have a slinger to evaporate the condensation by spraying it on cond coil