If their service is excellent and After Sale Support is continuous, if you have seen their work  and you are satisfied, if you have reached out to some of their references and they are pleased with the results, I would say yes, it is a reasonable price. Plus can your budget cover that cost. Also, you would want this Website company to confirm no other hidden costs will appear throughout the year. You may want to consider a 2 or 3 year contract if they offer this option.
I hope this has been helpful.
Dale Murphy @ BWP