Manual Treadmill (not electric)

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We have a Manual Treadmill that we need to get rid of for space, This has been in storage for some time, and needs oiling and possibly opening up to realign the track. It is very heavy so will need two people to move. The model is a Weider T250 and originally cost over £200 when new. We still have the manual which should help in the opening and oiling etc. We are asking for just £20, and this is really just to stop time wasters, as unfortunately on previous items we have had this problem. The only thing missing is a pin which is to hold it upright when in the folded position. However it holds itself upright anyway without a problem, but a bolt or screw can fit in this hole where the missing pin goes to serve the same purpose.I am sure someone technically minded would be able to open this up easility and get it working fine and then they will have got a bargain.