I don't have the vario you're interested in, but thought I'd add this here as it's drawn lookers for e-varios..
Our glider came with a Westerboer 910 and 921 vario and flight computer (vario is in M/S). I wouldn't mind selling these and picking up a decent but not overly expensive E vario. (currently also have an Oudie as well as XC soar on smartphone as backup and for quick/easy unofficial logger).
If anyone has interest in these let me know. If you've got a decent e vario laying around to part with, possibly a 302 in working/good condition, let me know and we'll see if anything works out.
Thanks