If your new to bocking ( yes that's what it's called ) and thinking of buying second hand you should ask people who already have some. Seeing that your on this site and reading this that what your doing
You have to get the right spring for your weight some seller either don't say or don't know.
If that's the case you could find that their no good to you if you buy them.
Spring can get bashed a bit or the user bottoms them out a lot which may mean they'll not last very long.
Ask about scatches and why their selling, " I need bigger springs " may mean they've bottoming out on they !!
Not all stilits are made the same, some are plain rubbish ask what type their selling ?
Some sellers use the wrong names !? Ask for prove the type !?
Most S/H stilts sell for between £50 and £200.
Remember some people don't know what their bidding on so don't just go by what others are bidding, check !
S/H may sound a cheap way into bocking but you don't know where they've be or if they'll last.
New PJ's costing for £115-£135 and if you've got a problem they'll be able to help you out