Original List Prices of IBM (and some Lenovo) era ThinkPads

This has always intrigued me... looking back, tried to build a database from web IBM List prices and old IBM PDF's with list prices.
Also include lowest street prices from Magazines at the time if can find.

Model intro dates I think are accurate within 3-6 months in most cases (so very occasionally may be shown in the year above its launch, never behind) - will use the pdf refs to get accurate dating later :)

Prices may vary according to config - but tried to find the average spec. price for those without any details.