I dont remember if £100k was a lot of dough then but remember Brian Deane was an unproven player and £30k was a reasonable size then
It wasn't really that a big fee even at the time, it was described as a miracle signing for the amount he cost
Here's a few transfers of relatively or completely unknown players at about the same time. I've left out the bigger transfers of well known players
Brighton signed Barnet defender Nicky Bissett for £115,000, a record for a non league player
Wimbledon sign an unknown defender Keith Curle from Reading for £500,000
Newcastle sign Coleraine forward Michael O'Neill for £55,000
Chelsea sign goalkeeper Kevin Hitchcock from Mansfield for £250,000
Newcastle sign unknown winger John Hendrie from Bradford for £500,000
West Ham sign forward David Kelly from Walsall for £600,000
Derby sign Oxford United striker Dean Saunders for £1 million (Who we were in a tug of war with Oxford to sign but when Oxford offered £60,000 for him we were blown out of the water)
Watford sign 19 year old Lee Richardson from Halifax Town for £175,000
Southampton sign Jason Dodd from bath City for £50,000