What's it worth--rust free 56step

[Huck]

Got an opportunity to buy this Texas 56 Stepside. It is straight as an arrow but is a project--in prime. Needs glass& interior. Has small rear glass and is currently a 6cyl 3spd, not running. Great doghouse, great cab, great bed but needs floor. Comes with a rebuilt 327 to install. Guy wants like $5,000. and around here it's impossible to find a rust free older truck. I kind of think $4,000. should be about the right price but am not that familiar with the market on these trucks. Opinions----