Barely made it under the beams, but at least the backpack's well hidden - nobody will try to climb in here.
― PDA message
The extra cash is under the concrete blocks is a stash featured in S.T.A.L.K.E.R.: Shadow of Chernobyl.
Overview[]
The backpack is hidden in the bottom of the Flea Market. One way to reach it is to approach from the front (west), go up the slab of cement on the left and drop down in. Watch out for the four Bandits that spawn on the east side every time you leave the map and come back (which is a good way to get some extra loot and stashes).
Gallery[]
Start from the north side.
Up the ramp.
Down this slab to get to the stash.
Note the location of the fire pit in relation to the stash.
Worth 3500 RUs.