The phono stage is quite good, and it is rare to find a BAT preamp with one already installed. The hallmark BAT build quality is amazing. I could happily live with the VK-31SE for a long time. I have a stash of NOS tubes that have just been packed away, and I decided to put together a system in which they can be put to use.
I re-tubed with a matched quad of Platinum grade 6H30Pi tubes from Upscale Audio when I bought it, and it probably has 400-500 (this tube variant is known for very long life) hours of use since, which is probably estimating on the high side. I'm including the prior Sovtek tubes, plus an additional pair of EH that are a match for the tubes currently installed.
I'm looking for the manual, but it is also available for download online. Unit is definitely closer to a 8/10, but I'll go with 7/10 to be safe. I could find no obvious dings, dents, discoloration and it looks very nice as you can see in the pictures.
Buyer pays shipping, and 3% credit card/PayPal fee. If you need it shipped outside of CONUS, please inquire prior to purchase to discuss.
Review of unit from TAS: http://www.theabsolutesound.com/articles/balanced-audio-technology-vk-31se-preamplifier-and-vk-250-amp-1/