Well, it looks like we blew our chance to help a new collector. Not sure how I missed this post, but I did, though I wouldn't be alone.
*VT/*VJ were printed in smaller numbers than other replacement prefixes (or so we think!), but they are not really much scarcer. Not much research into multicolour replacement notes has been done, quite frankly. Lots of information in the Charlton catalogue about this subject, which is published every year, is actually quite old and not very authoritative. In fact, I'm trying to kick start some research into the very subject and have not received much help.
Make sure there is an asterisk to the left of the prefix, otherwise it's not a replacement. I know that sounds like a silly thing to say, but some new collectors are not familiar with that sort of thing. They might think any note with a VT/VJ prefix is a replacement since there are non-replacement notes with the same prefix. The asterisk, if present, is part of the prefix.
A very light fold down the middle means the note is not uncirculated, so don't pay an uncirculated price for it. The ink smudge does not impact price unless we're talking about uncirculated notes. The multicolour notes of the era were commonly seen with ink smudges. Most people would grade any note with a middle fold as no better than EF condition, though if the fold is very light and the note is totally original, then it could be AU. But most of the time, the middle fold looks light because the note is pressed, and some sellers try to pass off pressed notes like they are uncirculated with a big asking price. Not naming names, but that's what some people do.
The market for multicolour series replacements is soft, though it can vary depending on the item. Shop around and you may find a good deal.