Isn't it always about timing, I just spent top dollar on a 2 battery tender. Although I probably spent too much I do get a lot of utility, when I'm out in the garage, knowing the batteries are being monitored and the charge being maintained.
If you are looking for one made in this country,if you could find one,it would probably cost $199.00.
Why wait.You can get a nice kit right now for 20 dollars at all the retail stores no one on this forum likes.
Just look in the camping,motorhome,boating and automotive depts.