Re: 1977 Glastron w/ 70hp Johnson
If the motor runs, absolutely. The Johnson 70 is a great motor and that one looks newer than 1977 (check the numbers). PLus you get a trailer that, if it rolls, is worth a couple bills, a trolling motor worth $100 and a fish finder maybe worth something. Anchor/gas tank/ PFD's and at worst you have a rolling yard sale.
Here's what I'd do: If the motor starts, runs and has good compression, then look at the transom. If it doesn't move when you put weight on the motor, buy it.
If there is no title, though, you will be scrapping the boat and keeping the motor. Does that work for you?
Who cares if the floor is soft? It's $500. get a couple seasons out of it and upgrade. I would not, however, spend time and $$ to rebuild but that's just me; a Glastron lover might.
Bring your own fresh gas to check the motor. I can't tell if it's a VRO so bring oil, too. And jumper cables.
You realize that for $500 there is no sea trial or survey. I recently bought a similar rig and talked the guy into givng me a week to run it on the river and return if there were major engine issues that didn't show up in the driveway.
better move quick I'm on my way. I need another 70 if I can steal it.