I don't think it is "slimy" at all, however we all know that there are a number of unscrupulous people out there who will try and make a living off of duping the unsuspecting public. This is especially true with specialty cars whether it is muscle cars, vettes, exotics, whatever. The exists because people are lazy and do not want to do their own research to understand true value, or worse yet buy emotionally. Generally a seller is going to try and make a case why his vehicle is worth what he/she is asking and the more gullible and uninformed the buyer is the better. This is where any of those craigslist adds clearly illuminate either a seller who doesn't know what they are doing and thinks their vehicle is worth X amount because of auctions and TV or a seller who knows exactly what he is doing and paints a pretty picture of rarity and value that some "fish" will bite on.
Therefore the buying an flipping scenario comes with a reputation (just like used car salesmen). The rep probably isn't applicable as much any longer but it is still prevalent. If you are buying Mopar muscle and making it road worthy and putting the back on the road, good on you. While I admire the effort I cannot believe it is overly profitable unless you are very specialized and highly talented. That said, if you are buying cars in yards, barns, etc and flipping them with reasonable prices, you are doing the hobby a favor.