For those who haven't seen one, here is something from Paul's site on the 2750 Panel Phone. There's also a 750 rotary version and they came in "silver" with a white handset and light gray frame, and "copper" with a light beige handset and frame. The copper ones were evidently more popular than the silver ones because they seem to show up for sale more often.
http://www.paul-f.com/we2500typ.html#PanelNick, it would be great if you could re-use the box and get a silver or copper panel phone to go back into your kitchen. Is there phone wiring in the wall where the box was? The color combination of light gray walls with white trim that's all over HGTV is a perfect match for a silver panel phone.
Panel phones that are complete don't come cheaply and the frames are made of thin, brittle plastic and often chip and crack. A quick search of eBay shows two copper 750 panel phones sold for $110.50 and $127.50. Their touch-tone brethren sell for even more.
If you decide not to install a panel phone, the device box would probably sell well on eBay because that piece is often missing.
I have a phone collecting friend who has a copper 1750 panel phone mounted in his media room, a new addition to his house. It's the 10-button version of the panel phone and quite a rare bird. Here are some pictures.