As a rule, companies pay much lower shipping costs than Joe-off-the-street. Anyone with an "account" with a shipper (UPS, FEdex, etc) will have some form of discount. Lately, whenever I've bought something, I agree in advance with the seller to use my company's puro account, and I pay the girl at Logistics the cost. Of course, I do clear each and every package with her first, but she likes me. If your office has any similar agreement, you just need to have a quick word with someone in the mailroom, and you're in business.
...If you really want one, I suggest calling around your nearest college campus to see if they have any they're trying to unload. Then try a nearby recording studio. They usually have one, or two, sitting somewhere that they didn't have the heart to get rid of for nostalgia purposes. They might part with it, for a fee, of course, if they know it's going to a 'good home'...
