Bottecchia Columbus SL, red 55cm frame, 1986-89???

Description

Repeating from the condition description:
30+ years old...I'd say it's in good condition.
My boss handed this off to me 15 years ago and I believe it's all original.
The only things I've changed are inner tubes and handlebar tape (boss might've changed the seat?).
Has it's share of blemishes, but looks good and rides good.
Don't have the time or expertise to go too deep on trying to identify the year/model.
Because the frame decal includes the 1986 Tour win, but doesn't include Greg Lemond's 1989 win, I guessed the production is between or during those years.
Searches on eBay completed sales and vintage bike sites show similar late 80s models selling anywhere 5-1500.
I'm confident that everything not mentioned is original.
Just lowered the price to 0.
I'll stick with that for awhile and see what response I get.
If you have any knowledge to share, it would be appreciated!