Underwood Hifi / Underwood Wally...

I'm sorry, this subject goes through my head every night in bed. It isn't Underwood HiFi you need worry about, it's some of these vultures right here on Agon. Mid to late 2000's, purchased a Bel Canto DAC that I had spoken to Wally about. I don't even know if he still does his mod's, but back then he thought a lot of that little Bel Canto piece and had 4 levels of upgrades. So I bought it and sent it to Wally. Sent it back ASAP and WOW, this was a different piece of equipment.... Well done!
So that was during a buy, sell, buy period; so I listed it here on Agon for I think a whopping $400. Guy buys it and contacts me and says did you open this at anytime.... there is a screw loose and I'm letting you know before I open it. 
Long story short, there was a loose screw, and he railed at me... Do you know what could happen????? I offered his money back, but he just acted like I had purposely sent him a Dirty Bomb???? 
I told him I apologized and told him I was refunding his money AND he could keep the DAC as well.
Conclusion? Don't believe all you read here.

Interesting responses.  Some are eye opening.  Walter/Underwood is no doubt a good longstanding retailer.  Thanks again for all the input.

Walter is a veteran in the high-end audio business and a completely stand-up guy who offers excellent value across the board. His Internet sales model is clearly a success. He responds quickly to emails. I have purchased a number of items from him and his support system is second to none. My most recent purchase: I'm awaiting delivery on a Black Ice Audio Fusion F22 tube integrated.  

Purchased two LSA branded products recently and they were shipped promptly and  perform wonderful at their price point.