It obviously comes down to equipment, maintenance and overall condition. From the description, it is a boat that has not been maintained/upgraded. So would be at the low end of the spectrum.
I have a 2003 with 225's, my broker indicated that it would move at around 100k. That said, the motors are worth next to nothing as is. A repower for 60k, a new genny at 10k, a fridge is probably 1k or more. Electronics 10k. So you are likely starting with 80k before the hull. To end up at 150 or so, you'd need the hull for 70. I figure that 150 is roughly the value of that boat with new power and updated equip.
Experience says that buying the boat with all the work done is less expensive than doing it yourself, but when you do it yourself, you have full control of what gets done, and choice of materials, which absolutely means something.