Torelli bikes enjoyed modest popularity in the late 90s. They received favorable press in Bicycle Guide. Bill MaGann (founder of Torelli) was something of a second-tier Grant Petersen. Generally, Torellis provide good value throughout their line. I bought a unpainted fork from Bill MaGann, and the workmanship and brazing was very nice. If Mondonico made any Torellis, I would guess it was on the high end of the line.
$350-375 would be about right. Agree with Jet on offering around $300. Wouldn't expect to get much out of this seller considering the reference to ebay prices. Depends on how much the person wants the bike gone.