[alasdair_]

>Therefore, no one is going to pitch a legit arbitrage opportunity to you.

I once wrote a quick and dirty arbitrage tool for Magic: the Gathering cards (stores publish price lists they will both buy and sell at). It really did work but (of course) it quickly caused a lot of the best arbs available on the market to go away.

Eventually the store owners themselves paid me to tell them if they ever had arbitrage opportunities for their own stores (to avoid accidental mispricing versus competitors) and the whole thing sort of went away but we absolutely DID pitch a legit arbitrage opportunity to people that people paid us for (and, in fact, still pay for today).

A super old test version of the free version of the tool is here: https://mtgpricer-uat.appspot.com/arbitrageTool I doubt it actually works any more though.