Will i too sense your frustration as Roxy54 described. Things do have a tendency to go off the rails a bit when inquiring on a budget Chinese product at such a reasonable price. I would only add these points in assessing whether or not to consider these products. Do you know a technician that can go over the amp prior to firing it up? Can you afford to send it back, presumably on your dime if it doesn't work out? What is the absolute limit of your budget, can you afford the risk if something bad happens beyond the amp?
The point is that there are going to be compromises beyond labor and lack of regulatory requirements in China. I would try one if i could afford it failing without too much expectation that it could be returned back to China. Sure they may replace broken parts but good luck returning and expecting a full refund. If it were me and i were in your situation i would seriously consider a used tube design from an established manufacturer at the limit of what you are willing to pay. At least you will be able to resell with little if any monetary loss. One can read the on line reviews and conclude all is wonderful in paradise but at THOSE prices paradise may be too much of a bargin or in your case risk. You have received several excellent recommendations on some mainstream manufacturers and you seem very thoughtful in processing. Good luck!
The point is that there are going to be compromises beyond labor and lack of regulatory requirements in China. I would try one if i could afford it failing without too much expectation that it could be returned back to China. Sure they may replace broken parts but good luck returning and expecting a full refund. If it were me and i were in your situation i would seriously consider a used tube design from an established manufacturer at the limit of what you are willing to pay. At least you will be able to resell with little if any monetary loss. One can read the on line reviews and conclude all is wonderful in paradise but at THOSE prices paradise may be too much of a bargin or in your case risk. You have received several excellent recommendations on some mainstream manufacturers and you seem very thoughtful in processing. Good luck!