Rowe BC2800 is two 1400s with a single faceplate. Being open to the weather would be a concern. New shields are about $81 ea. New validators are about $530 ea. If the originals are included, I'd still buy a spare validator...they need regular "attention" at a busy location.
It's not too hard to remove, unless it's welded in. Remove all the internals. Unbolt the faceplate, and slide the cabinets out of the opening.
If all the parts are there, I'd maybe offer 10-15% of original price.