It largely depends on how much your budget is.. if you can spend alot - you can go with a fursuit maker.. (generally the *less* well known they are, the more likely they are willing to negotiate with you on a price).. if you're on a budget, (and, who isn't these days?) - you can try the various auction sites, for lower prices.
But, the competition (between buyers) - can be fierce on there as well.. so, be prepared to hustle.. if it's a popular item you like.
It's certainly debateable whether some of the more "well known" fursuit makers out there are worth their price - so, it's largely up to you.. if you feel comfortable in paying that kind of money, or not.
IMO, some well-known makers are quite "over-hyped"; and better deals can be had, elsewhere.