i am selling some items at a garage sale and want your opinion on how much i should sell them for.?

i am selling 3 mountain bikes:
-2 of them are adult mountain bikes, 2 years ancient, mint condition
-1 is a child mountain bike, 5 years ancient, excellent condition

i am also selling a lawn package that includes:
-1 6.75 hp self propelled craftsman push mower, 2 years ancient, mint condition
-1 weedeater, mint condition, 2 years ancient
-1 trimmer, mint condition, 1 year ancient

how much must i get for each bike and how much must i get for the lawn package?

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