I've got roughly 35 3A4 pentode power tubes, all used. I tested a couple and they tested OK. These are relatively low voltage and low power, about 600mW each class A. If anyone wants to experiment, there are plenty here to play with. I haven't got any sleeves for these, so they'll be a hassle to pack and ship. Local pickup is possible. $35 +shipping takes them all. Shipped from 94591.