for fun, i used ebay's Personal Data request tool to extract out my ebay purchases from 2001 to 2010, so i could get a picture of how prices have changed over the decades when it comes to old computer/video junk
Aug 26, 2003: Ultima Worlds of Adventure: The Savage Empire
$13.49 USD
Currently: $100 USD
May 23, 2003: LC PDS style Ethernet adapter $5 USD
Currently: $50 USD
Apr 12, 2003 Druid: Demons of the Mind $2.99 USD
Currently: $40 USD
Apr 07, 2004 1988 Interplay Commodore C64 / C128 Game Neuromancer $9.99 USD
Currently: $150 USD
Apr 23, 2004 ULTIMA THE SECOND TRILOGY IV V VI BOX SET PC GAME $11.86 USD
Currently: $150 USD
Nov 10, 2004 PRINCE OF PERSIA (SEGA CD) EXCELLENT CONDITION $5.00 USD
Currently: $50 USD
As you can see, it's approximately a 1000% price increase on retrocomputing products since 2002. Without having to show you the entire history, the price stayed relatively flat until about 2010, when it started to creep slowly, and then went up several orders of magnitude by 2015-2020.
It's a silly, bad time to buy old computer games on ebay. prices are still hyperinflated (starting to drop, very slowly).
i've bought almost everything i have locally, for $5-10 each, just by keeping an eye on local listings - and ignoring the people trying to sell at ebay prices.
if you want to see your entire ebay history, you can request it here. it takes about a week to get your history.
https://www.ebay.com/help/account/requesting-personal-data/requesting-personal-data?id=5089
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