For under $1k, you can get a top quality all-Japanese single ended tube amp, professionally assembled by the distributor VK Music! It can use 6L6, KT88 (6550) or EL34 type of tubes. So you get 3 different amps in for one price! Best of all, you don't need to bias the amp - change tubes then you are good to go. 

 Well made Japanese amp kit, optional to be assembled professionally... can be a EL34 / KT88 / KT120 /  KT150 amp as you wish...push a button to set bias.... a true low maintenance GREAT amp at unbelievable price..