Its against the rules to post an auction before it has closed. Yes, that means that trucks like this may be more likely to get to the scrapper, but the rules are what they are. The priority here is more that some folks can keep sale secret to get better deals than it is about saving stuff from the scrappers. Not my site, not my rule, but it is what it is.
Edit your post to say "If anyone is interested in some M757's in Texas that will be sold soon PM me" nd you will be in compliance with the rules- then just give folks the link via PM. That way you are in compliance with the rules and can still help save these rare trucks.