$248.03 including sales tax and shipping. Received an offer from the seller for 5% off plus shipping. Counter offered 10% off including shipping which he accepted. 8" jaw width and will be used on my new to me horizontal mill. Really didn't need it yet, but the offer was too good to pass up. Shipping weight was 111lbs or 50.4 kg. Haven't had the time to inspect it, but I strongly suspect it will more than meet my needs. Will certainly make machining an arbor support much easier. Got to get busy designing one which I'll fab up from aluminum and insert a bronze bushing. BTW, this is the seller's photo. Mine is sitting on the base of the mill.
I'm also going to buy one of these:
and mount it on top of the ram so I can load/unload the vice and the vertical attachment and reduce the strain on my back. May get a second one for mounting the 12" chuck on my lathe. It too is a beast.