There are a lot of different models of the Rockchucker press out there ... and you can see some of them in this ebay link...
http://shop.ebay.com/items/rcbs%20ro...ucker&geo_id=1
this link is also handy for you to see what parts your press is missing - and I'll defer to others on specifically which model it is ..
You can buy a Rockchucker Press - complete with all the parts - and little if any rust - at any gunshow I've ever been to for under $ 50 ( and have at least a dozen of them to choose from).
At my gun club it seems like once or twice a year ---someone brings in a box of old reloading stuff ..( take whatever you want ) with a variety of Rockchucker parts / and sometimes a press in there... / and on Sunday afternoons at a gunshow ...you might walk away with one free ...or certainly under $ 20 with some accessories ( a guy that drug a bunch of them in there / sure doesn't want to lug them back out to his truck at the end of the show). At my local show last month ...there was a table that had at least 6 of them for sale...