Since I few boxes only it might be the original 4CD Star Wars box.
Yes, that WAS expensive. I first saw it in a FNAC record store in Paris while on a school trip there in 1995; I was shocked by its mere existence. But couldn’t afford it. A few months later, I bought it via mail order instead, for – I think – about 450 NOK. About $50. So about $10 cheaper than the Irwin Allen box, but still about $102 in today’s money.
Very tough for someone who was still in high school and had to save up allowance money. Heck, $50 would have been tough today as well, to say nothing of twice that.