At this point, it really doesn't make sense to invest in any Nvidia card for use with macOS. If you will be using a more modern CPU such as Kaby Lake or newer, the IGPU will probably outperform a GT 730, much less a GT 710. Please see comparison link below:
Comparing Intel UHD Graphics 630 with NVIDIA GT 730: technical specs, games and benchmarks.
technical.city
On top of that, it's very questionable how much longer Apple will continue to include support for any Nvidia cards. We already know that Nvidia can't be relied on to supply any drivers...
With all this in mind, I feel it's an absolute waste of money to buy these old Nvidia cards for use with macOS.