Yes, regarding the details about the CPU, I've been doing my best not to make comment, pleased to see others are sitting on their fingers too, it seems such an inviting target!. The first time it was listed there were comments about two other machines that started the portable market before it (osborne being the name I remember). I would suspect the advert meant to say the first 'Compaq portable' (
https://en.wikipedia.org/wiki/Compaq_Portable). But as hinted, the most intersting part about the advert is the 80186, all the literature I've found so far says it should be an 8086 or 80286! However if it is, it's likely not an Intel part at all, but the more common NEC V20 (
https://en.wikipedia.org/wiki/NEC_V20). I've seen the i80186 in various add in cards, and know of its use as the BBC Master 512 second processor CPU - coincidentally it is the processor emulated in the original PC compatibility software for the Archimedes range, but until I checked wikipedia I didn't know it had managed to be at the heart of 'real' computer hardware. If it is, this may just be a very collectable item. Since the seller has access to the internet, I'd advise a bit more research on his part to flesh out the advert and get the facts right to justify the price. However, if a dead poly is worth $1200, the computer that started a successful and well known industry leading company must easily be worth $750 ;o)