This has always worked for me. I divide the cost of what I paid by 3. That is my garage sale price. Then if the day is dragging I mark it down to a fourth.

it depends on the quality of the items. if it is in great shape divide the regular price by 4 or 5. I would say the slide should be atleast $15. if it doesn't sell in the first day lower it to anywhere from $10-$12. The picnic table should be anywhere from $25-$30.hope i helped!!

Presuming each is in good condition. I would recommend $50 bucks for both or $30 for each. A little pricey for used goods; however, the "bargining" process needs a starting point. A point that is not unreasonable. $50 is reasonable.