Stratos boats are good boats, but there's a lot to check before you buy one used: Check the boat deck for weak spots, check the transom for flex and weakness, take it for a spin and see if it leaks, have a mechanic check the compression and motor for $150 bucks or so, check steering free play, etc. An Internet search will give you plenty of checklists on what to look for. I wouldn't skip any steps when purchasing a used boat.
Some owners lie and some owners don't have the knowledge to know when a boat has problems. I wouldn't take my Mother's word on the condition of a boat.