Had one.
Cost me only $351 w/an LEO discount. MSRP is only $390. Traded it for a BRS Alpha Beast ALT 3.0 which I felt was a fair trade. The person to traded me for the BRS, sold the MUDD for $510; net about $490 after PayPal fees and shipping. $100 more than MSRP.
It is NOT worth over $500. Please do yourself a favor and do NOT do what they are doing w/the Slyz Bowie and overpay for this knife. G&G will be making them again in 2020. Put your name on the list now. If you can find one for less than $400, buy it. Otherwise, spare yourself the expense and wait til they become available again.
It's NOT that great a knife UNLESS you plan to drop it in the water/mud or gunk it up w/blood & guts skinning/cleaning varmints/fish. I've got 24 other autos and I like/liked ALL of them better than the MUDD. That's why I traded it.
If you need an auto that you can use w/o worrying about messing up the blade, just buy an Autonomy 2 for about $190 which has a LC200N blade that will NEVER corrode; the same can't be said for the 20CV blade on the MUDD. Just be careful not to mess up the works of the Autonomy too much and you're good at $200 less than the MUDD.
You don't know me but TRUST ME on this! It'll save you $$$$. Use the $500 to buy TWO other autos (or 2-3 other folders) that you like instead.