Free: Contests & Raffles.
Average reasonable taxi wait should be around 12-16 months. Anybody waiting for 2 years turnaround should be expecting a competition level finish or fire their taxidermist! There are plenty of acceptable level taxidermist around that we should never wait 2 years. For any taxis that question this IMO you either overbooked or need to get off the phone and get to work..
I think the better the taxi, the longer the wait, I'm good with that. Its artwork you will own for the rest of your life.
I think you'll find that most of the taxidermists that are/were advertising on here currently and back in the early days of Hunt-WA take longer than 12-14 months, but I think you'd be hard pressed to find better work.