The McDermott C17 cue had an original MSRP of $300.
Cues from this series are fairly well sought-after by McDermott cue collectors and enthusiasts, however, condition is everything. Many consider the McDermott C-Series one of the best ever made by McDermott.
Also see this previous post in the "show off your cue" section:
Your McDermott C-17 cue is really beat up and most collectors would have to send it off to be refinished, at a cost of between $100 and $200 or more.
To give you an idea, a McDermott C-17 cue was for sale in 2018 in good shape with three matching shafts for $850.
Here is another one for sale right now on eBay from a reputable pool cue dealer, The Pool Cue Shop. It was sent off to McDermott for a full refinishing, leather wrap installation, and to have a new matching shaft made. It is selling for $1350 USD. If a non-dealer was to sell the same cue, it would sell for a bit less (just like the same automobile might sell at a used car dealer for more that it would sell for from a private seller).