Welcome to ExPo, thats quite a rig you're looking at there.
It seems pretty high priced $2k for 300 miles and with all the leaks etc you mention, are you really ready to do a lot of your own wrenching on it?
I found several just like it when I was looking a few years ago and for a little more money, you can usually find a lower mileage unit thats been cared for a lot better. There are even a few for that same $ amount, but you have to search around a bit.
No matter what though, it's an older rig and almost all in that range will need a good bit of PM to trust it on trips. There's another great site a lot of ExPo folks belong to IH8MUD.com
The site is a wealth of info on all the cruiser models and there's a great classified section with a ton of rigs for sale.
Andy, Megan & 2 dirty ACDs
92 FJ80 OME HEAVY 850/863 TOYO MT 285/75/16 Interior Storage Unit( in progress) ICOM 2100
Custom Rear Carrier, Plenty of dog hair