...you're entitled to your opinion, but calling his auction a "rip-off" IS offensive...the mic alone could sell for $75 easily (as might the Tube Pre without the upgraded tube as here:
http://www.musicgoround.com/gear/inventorydetails.asp?id=592375)
...and he did include a "Make Offer" option for those who feel the price is high...based on the original cost of both items and the upgraded tube, he's not that far off...and he's only asking $5 for shipping...give the guy a break...
...and Tone, there's certainly no need for an apology from you...best to list it on Craigslist locally and avoid the shipping...more room to haggle...good luck!