I have a cutting mat approximately that size - but also have a table. It is a great surface and I don't know how I would do without it. My suggestion is to go to Home Depot type store and have them cut you a piece of plywood about an inch or so larger on all sides and place it atop your regular table. When you cut, be sure to cut within the scope of your regular table, otherwise it would tip. A large surface is great for laying out garments/quilts patterens and for spreading out your fabrics for auditioning. I do not think you will get much for the old cutting mat (remember packing & shipping), and I think you will do better keeping it. It can be stored (along with the plywood), upright in some area - you will in the long run be happy you kept it.