I want to build a small bot that would be able to really go quick. I am looking in the ballpark of 200RPM dc motors, likely two-wheel-drive. Would use a prop mini and L298N to drive them. I would likely use four AA batteries, just like the BOE-Bot does.
I have looked at these motors,
which look really good so far as strength, but I cannot find them on amazon for less than $7.55 and I really would like to buy from there. Also, the little yellow kits
for the famous DIY Ardy bluetooth smart cars are $11 for four motors. So I ask here: Should I buy the all metal ones from Ebay
or buy the yellow plastic ones from Amazon?