This may be a little against the grain here, but let me pose a scenario for you. I bought some insulation for my shop a while back. 4x8 sheets of 3" thick foam with shiny aluminum backing on both sides. Great stuff. Loved it! But, I bought some extra. 9 sheets extra to be exact. Well, while cleaning out my shop today, I decided to finally get rid of it. Of course, I had to put a value or price on it. Here was my thinking...
I got the sheets for $19 each. I had to drive two hours in each direction to get it. Including load up time, it was 5 hours out of my day. Not to mention $40-50 of gas. Oh, and the guy I bought it from as a business, not some dude that had some extra, so yes, there was tax. Let's not even figure in wear and tear on my vehicle. At 35 or so sheets, my cost was about, or the "value" was about $21 each sheets.
So, in my mind, to sell this to someone else, if the buyer were to go get the sheets him/herself, the tax and delivery DOES enter into the equation because I don't charge tax, but it tax was part of what I paid. So, if I were selling them on CL, I probably would have charged $21 per sheet to recoup my money. BUT, I sold them to a friend (my sawyer) for less than $15 each because he was doing me a favor by taking them TODAY. And I didn't have to hold on to them any longer, make up an ad, deal with a million questions, have no shows, and have a stranger off CL come by my house and haggle me down.
In short, the value, in my mind, comes from what it cost me vs what it would cost someone else to get it.
When bidding on a piece at an auction, you HAVE to factor in the tax and fees (if any) in your bidding price. Otherwise, that $850 bid turns into $1000. And maybe you could have gotten it for $1300 NEW...delivered. So, why wouldn't delivery and tax be part of the equation IF someone chose to put that into the "value". Think about it. If someone advertised their used TS for $500 and you say, heck, I could get a new one for $700 from Company X next week on their "sale", could you really get it for $700? No. (Unless they are offering free shipping...but ingore that for a moment.) With tax and delivery, you are probably up to more like $850 to $900. In my mind, you HAVE to factor that in. In which case, $500 with no tax and around the block is significantly less than $900 new, delivered.