For a Robbins or GAHH top with a glass window on my 97 the parts plus labor was looking to be about $1700-1800, about which $700 was labor.
See if the person you spoke to will be willing to do the job if you purchase the top yourself and have them install it for the cost of labor. If they are, you can save yourself a few hundred dollars on the top by going to
www.autotopsdirect.com. Since you're not going for the top of the line acoustic model, it'll likely be a good amount less than the retail cost from the shop purchasing it. Usually it's about a $200 difference in cost, so it's an option you can consider.