I just bought this beauty on ebay and received it in the mail today. It is an X-ACTO 3051 Professional Swivel Knife and it looks to be in pretty pristine condition. It even came with the case and five replacement blades. This is the knife cut paper artists rave about and are all wanting to have, but was discontinued by X-ACTO several years ago. I have been watching ebay awhile to try and find one. Some of these knives listed their have gone for upwards of $90. Somehow, I managed to find this one as a buy-it-now for $10. What a deal! I can't wait to get over this crummy flu and start using it in earnest. Woohoo!