40 x 100 = 4000, all of your dupes are still 11,000 points off of one barrows set, which is not guaranteed to be a desirable set. So based on your argument, your logic does not hold up in regards to “flooding the market”
I am not the only player on the sever there are 1000's of barrows pieces and only some are desirable, this would further devalue them but, now thinking about it, it would be a good sink for barrows items that isn't high alching. The amount of points per piece would have to be low though.