I've got a variety of great sounding preamp tubes available for anyone interested. Whether you wanna make your stock Marshall roar even more, give it a tad more chime, or smooth out some fizz, your preampsection is a simple and fun way to start experimenting. The tubes I have for sale are all great sounding tubes in their own right, I have personally sampled each and every one of these tubes in my 1999 Marshall TSL122. And what a variety of tones can be had with each and every one of these. If you see any you want, shoot me a message, ask questions, make an offer, whatever, let's communicate. I'm easy to deal with. Meanwhile, all ya'll out there in Marshall Country, Rock On! Email: email@example.com Text: 931-303-3330 ALL PRICES ARE NEGOTIABLE but do NOT include shipping (USPS small "If It Fits It Ships" box). $10 -RCA 12BZ7 used/vintage $15 -RCA 12AX7 18-16 used/vintage $10 -Mullard 12AX7 NIB $13 -Mullard 12AX7 NIB $50 -Mullard 12AX7 used/vintage $12 -Westinghouse 12AX7A Made In Germany used $12 -Westinghouse 12AX7A Made In Germany used $10 -Electro-Harmonix 12AX7 Made In Russia NIB $10 -Electro-Harmonix 12AX7 Made In Russia NIB $30 -Telefunken 12AX7 22-24 Smooth Plate used/vintage $10 -Tung-Sol 12AX7 NIB $10 -Tung-Sol 12AX7 NIB $15 -Tung-Sol 12AX7 Gold Pin (ECC803S) NIB $19 -Tung-Sol/Zenith 12AX7A Zenith TV used/vintage $20 -Matsushita 12AX7 D Getter used/vintage $20 -Matsushita 12AX7 28-30 45° Getter used/vintage $20 -Matsushita 12AX7 26-27 Flash - Slant Getter used/vintage $10 -JJ 12AX7 used $15 -JJ 12AX7 Gold Pin $12 -Sovtek/Fender 12AXWA used $27 -GE 12AX7 21-21 used/vintage $27 -GE 12AX7 30-30 used/vintage $13 -Raytheon 12AX7 126-130 / 25-27 Grey Plate used/vintage $15 -Lindal / RCA 7025 24-26 used/vintage $49 -Eico 12AX7 30-30 Made In Holland used/vintage $35 -Mini Watt 12AX7 30-32 used/vintage $10 -GT (Groove Tubes) 12AX7R used $20 -Sylvania 12AX7 JHS used/vintage Just a note... After each tube you'll see a note indicating NIB (New In Box), used (modern production tubes that are used but in good condition, operable, and so forth), and used/vintage (these are classics, i.e. old, old, old tubes that are tested and function as they should (and that sound great, in my personal opinion)). Questions, again, shoot me a text or an email and I'll get back to you ASAP. Thanks!