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If that bayliner has a good engine and outdrive, then $2k is a fair price for it. If you don't know much about boats, then get a marine mechanic to go over the engine to make sure it is in good shape.
Read through some threads here on boat buying and what to look for. There is a sticky on iboats somewhere - I think in the general boating section. You want to have a good idea as to what really needs to be done on the boat before you buy it.
As for the restoration, the restoration on a fiberglass boat can be very extensive. If you have a solid hull, solid floors, and you are simply doing interior work like replacing upholstery, then the restoration is (relatively) simple, and $2k is a really good price.
However......
My guess from the price alone is, that you have soft spots (meaning rotten), floors. Rotten floors means you will also have rotten stringers and a rotten transom. You have to take the entire boat apart to properly repair those issues. Take a read through some of the restoration threads here to get a sense of how much work you are looking at. The estimates for the materials cost of restoring a18' fiberglass boat range between $2000 and $6000, depending on what needs to be done. Typically if you are working evenings and weekends - you are looking between 6 months and a couple of years of work for a restoration.
A 26' boat is a ton of work - there are very few completed 26 footers on here, because the work is often too much for people to do.
Having said all this negative stuff, if you have a good hull, and a boat that is mechanically sound - then $2k for a restorable boat is a pretty good price.