The 271 is a good unit for the price point. For not a lot more money, the 291 is a better unit imo.
The ms261 is the pro grade saw in that 50cc class and it's worth every penny over both that I listed above. Lighter, faster, more power, and easier to work on.
A lot of dealers will give discounts if you ask and pay cash. I give 10% off on pro saws for example.
Whatever you buy, use high octane e free fuel only and quality 2 cycle oil.
Www.Pure-gas.org