I've never had any good results from textlinks.com You're honestly better off buying sponsored blog posts.
$370 is very high cost but in $370 how many backlink they provide and that backlink is Beneficial for our site or not how can we say they give 100 backlink so its quality link ?
I have used their free version, they give out 25 free links, and i don't found any good output. You get links from those blogs which are quite new and don't have the said PR. So its worst to invest on such packages.