I have a homemade 5" f/15 refractor tube assembly w/o objective to sale.
The tube is made of Hollowood (a very light weight, strong wood composite) and is finished with a dark wood stain with polyurathan.
The inside of the tube is lined with flocking paper. The tube can be unscrewed in the middle to make two pieces. Also has a plain but functional 1 1/4" focuser. Without objective assembly weighs about 9 pounds. Asking around $100 total. Can call me at 972-394-8168 during weekdays for more details.