Now is the time to buy if you are at all interested in Sword Coast Legends, as the developer has closed their shop and their publisher was only contracted to sell through the end of this year, so the game will no longer be available for purchase after December 31st.
$4.95 is a pretty good deal for the game. It got panned on release mainly for people’s disappointment that it wasn’t the spiritual sequel to the Baldur’s Gate and Neverwinter Nights franchises that everyone expected it to be. It also released in a fairly buggy and messy state. Numerous updates over time addressed a lot of that though, and a free expansion for it was released in 2016 after the developer shut down (the publisher finished and released the content). The publisher has also released several patches to the game on their own, and recent reviews are much kinder to the game than the initial wave in it’s first year of release.
If you approach it as a singular one-off RPG with some editing tools you’ll probably enjoy it, if you expect it to be a system in which you create modules, host your friends and spend hundreds of hours campaigning, you’ll be disappointed.