I'm new to vintage bikes, but, through my garage sale adventures, I have acquired a few older bikes that are in very good to excellent condition. So I'm on my way.
I used to campaign a show Corvette many years ago in my single days. I remember that originality was paramount. A car in fair condition, but all original, usually beat an immaculate car that had several non-stock changes. So, when I evaluated my small number of older bikes I placed high value on originality. However, as I read various threads in the Vintage Forum, I noticed many posts about great old bikes that have been 'upgraded' with 700c rims and tires, newer gearing, new saddles, etc.
My question is, what's up with the changes? Is the value of an older bike (I'm referring to 70's or 80's bikes) not affected by changes or if I have an original in very good or excellent condition, should I maintain those original components. (Of course I'm not reffering to like for like replacement tires or brake pads.)