I just purchased these tubes from a head-fier on this past Sunday, 3/11. He was the one and only owner of the tubes. He had put only 200 hours on them before recently selling his 300B amp, and then these tubes. I purchased the tubes to audition them with some other 300B tubes that I have. The Carbon Princesses suit my tastes more, and so I am selling the Mesh tubes. I used the tubes for about 4 hours.
This is the ceramic base tube, which costs $400 plus shipping, new.
I'm asking $225 through PayPal. I'll absorb the fees if you pay by credit card.
Shipping is not included in the price, as the USPS shipping method is entirely up to the buyer. I'll ship no slower than USPS priority, just to help ensure that the tubes arrive safely. I have boxes and packing material, so the cost of "shipping" will be only the actual charges from the shipping provider.
Please, let me know if you have any questions.
I have perfect feedback as buyer and seller on head-fi, under the same handle, A1joe507.
Here is a link to Sophia Electric's page for the tubes.