I can confirm that Steph Black should be avoided. I purchased a ” Like new, just back from service Mychron” from Steph Black 2 years ago, and received a completely different unit than was advertised. I got an old Mychron 3 gold that had the batteries left in it for years and was corroded beyond belief. After several months of Mr. Black making promises and excuses I filed a Paypal claim and my money was refunded. I had sent the Mychron unit into AIM to see if it was able to be repaired prior to filing the claim, and they called me and told me that Mr. Black had sent it to them previously and had been told it was no good and was not repairable. I was fortunate enough to get my money refunded, I hope that you are successful too.