A decent, entry-level stock SS bike is going to run you $300ish. You could probably sell that for around $200 or so. Converting that bike can cost anywhere from $20 to $90 depending on if you want a new rear wheel or just want to use the stock one.

I would convert it, but then again I love 80s road bikes and find most modern offerings unexciting.

It's not like you can't just convert it back if you don't like it or want to sell it later.