This is a personal opinion based on the 3 presses that I have owned over the last 8 years: Bogen/Technal 560, Seal Masterpiece 210 and now a Bienfang Masterpiece 550. A smaller one will do 8x10 mounted to, say, 16x20 paper, but as you are likely to need a larger size in the future, you may want to get the biggest one that you can afford, and that you have the space for, as they will last and they are not easy to find second hand. My friend, a respected photographer Alan Ross, has recently replaced his Seal 510, which gave him some 40 years of use. He expects the same from his new one.
You can still buy a new Seal Masterpiece, under its new brand name DK, from B&H in US and direct from the distributor in UK/Ireland. 250 will set you back some USD 2-3k and 550 double that, depending on voltage requirements (110V are cheaper). Second-hand they come up more often in US and rather rarely in Europe, maybe 1-2 a year. Sometimes they are called Bienfang, the middle of the three brands it had carried that I am familiar with. When I got my 550 a few months ago I let my 210 go to a friend who trades photo equipment, I can connect you with him in case he has seen others around. Shipping will be expensive, though. The machine alone is some 30-35kg for the 200 range, and about 95kg for 550. Crated for shipping, the 550 is 125kg.
Bear in mind that you will also need to get to know it, and practice a bit, before it sings, using a tissue that is still designed for a mechanical press (as opposed to vacuum), so go for DK Colormount and not Unimount, for example.
Good luck finding one. Once you have mounted your first print the joy of that perfect presentation will exhilarate.