It's a strong keyword with good search volume, decent serp and advertisers. However I do see some mixed reseults, namely things like Library-Software or Library(word)Software. On a broader match, Library Inventory Software or Library Management Software. However this must have some popularity as net, org info us biz are all taken. Search trending shows no change in 6 months to volume so this is not a growing field but not declining either.
Is this name a reversal of its more common terms? LibrarySoftware shows 5x the search results, so it is also part of the problem. You would then have the second highest name for this word combo, not the first. How old is the domain? Appears to be about 3 years which doesnt add value.
My best guess is going to be a range, since I do not know much about this particular product market. End user could see high value with some good communication skills by the seller. By itself value would be at the very low end of the range. If this is market with product to sell, I would definitely go after the development route as that is what will drive value higher.
mid $xxx to low $x,xxx