Dear Ihcho, It was several years ago that I bought the 6C33Cs from Victor. I bought two sets of six matched pairs each. At that time, I think Victor had the inside rail to obtain tubes that had been built in the Ulyanov factory in the early 90s. Those are said to be the best run of 6C33Cs. I either paid $80 per matched pair (i.e., $40 per tube) or $100 per matched pair. I really think it was the former amount. But bear in mind that this transaction might have taken place as long as 10 years ago. Anyway, since you have a BAT amp, they should give you some sort of deal, but it would have to be based on current values. You have a high-end amplifier; why compromise on the output tubes? They will last a long time.