Lots of random unorganized thoughts here:
Full disclosure: I access my land over an easement. I don't have a problem with it, and get along fine with the up-front neighbors. That said, of course I'd much rather own the strip that is the easement, rather than having 'permission' to cross it, but it works fine as it is.
I looked at the google map of your place.
To help put this in perspective... The easement looks to be right at 300' long at 30' wide....only 9000sf, or about 2/10 th's of an acre....at $5,000 an acre, that's a thousand bucks worth of land.
From the google satellite, neighbor's driveway is a two track lane, and, going by the property line locations on google maps (which are always off some), about 1/3 of it veers off of your property anyway. At best, it looks like they are only using 8-12 feet of the 30' easement for 2/3rds the distance. 2000 sqft vs. 9000 sqft. $222 land value. Since it's for sale, I wouldn't do this now, until new buyer's surveyor and home inspector/etc are done and gone, but I'd just fence in your lot starting 4' off of the worn tracks and parallel to their worn in place driveway, and call it good. Hopefully the new buyers will be good folks...crack open a couple of beers with them after they move in, and just do it.
Worse case, if you poke and prod too much and stir the shit, the neighbor to your west could see that the driveway, as it appears of google, is partly on his land, and force it to be moved onto the legal easement. Be careful who you talk too, sometimes the status quo is better.
Otherwise, you could possibly facilitate buying a new easement to the property from one of the 3 landowners to your West. You don't know their financial situations but one may jump if you waved a thousand bucks under his nose to purchase access. Then 500-1000 to rewrite his deed showing the new easement, and 500-1000 to rewrite your deed to 'erase' the easement from your parcel, if that is even possible. So, now you've gotten $2-3000 bucks or more gone over a couple hundred dollars dirt.