Just thought I’d share my experience with a large Tube re-seller. I read thetube re-sellares reviews of the sonic personality of their tube offerings. I liked the description of a particular tube brand and model. I had had good experiences with that Tube brand in the past. I didn’t take the time to read other sites who share customer service reviews of thetube re-seller. So I purchased 8 matched EL-34 tubes from them. While I waited a couple of weeks for them to arrive, I took my amp to a repair shop. There they warned me that the particular tubes I was waiting for were problematic. So I called theTube Re-seller before my tubes were delivered and asked if I could upgrade to a different tube set. They assured me and were quit forceful, that I keep the tubes that were coming. They said something like this: “We are a mega store and sell thousands of this tube and have NEVER had any problems with them” If you don’t like them we can always exchange them..” I caved and said ok. My amp was still having problems and the shop I took it to couldn’t fix it. So I called the manufacturer again to get direction. In conversation I said what tubes I had bought and was waiting on.. The manufacturer said “ hey those tubes are trouble, we’ve experienced several Tranny’s burn up because of those tubes, We highly recommend you choose something else.“ So I called theTube Re-seller again. Shared what I was told. Again they dodged and said it was a ridiculous claim and that the tubes I had invested in were excellent and reliable. Three more weeks go by and I take my amp to yet another repair shop in Tampa Florida (excellent guys by the way) They fix the logic chip that was my amps problem, but then they install my new tubes and tell me four of the eight are bad. I said “What do you mean bad?” He say’s “well if you slightly touch any of them they sparkle like the Fourth of July. Trust me the’re bad” I call thetube re-seller and share that the shop says that four of the 8 are bad. They get all huffy and defensive and say that its impossible for tubes to leave their shop with any problems... that their tube tester is really expensive blah blah blah. They are rude indignant and uncooperative. They put down the repair shop and say they don’t know what they are talking about. They say they demand to know what tube tester they are using to conclude their tubes are bad.. The repair shop calls for me. They give them the same crap and tell them (I’m standing there) that they will not talk to them only me the buyer. So they hand the phone to me and he gets all huffy and rude. He finally gave me a return number but I have to pay the shipping to CANADA (I live in Florida) for their Bad tubes. They told me “we’ll just see about this with our tester, but if they show ok, you’ll have to pay us shipping to send the same tubes back.” I shared that I had contacted them multiple times (emails and phone calls) and asked to upgrade the tubes.. they didn’t care. I reminded him of what they told me each time, they didn’t care. I sent them back to CANADA last week. Haven’t heard from them yet. Be warned. Buy from reputable tube dealers that others have reviewed. Just because a place “seems” big doesnt mean they are reputable.