Too many unknowns about the 2nd saw but it's clearly not in "excellent condition" and your first weekend will be spent cleaning off rust before you even get to any other issues.
I've been reading that thread on 80/20 extrusion fences and they discuss it being much cheaper than an aftermarket fence but looks like the cost was around $225. That puts it higher than a Delta T30 and almost in the same range as a Vega. Or you could buy a used Delta Unifence for around $120.
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