I just got a Garmin and retired my Oehler after nearly 40 years. Amortizing the $600 I paid for the Oehler over that time it cost me about $15/year to have accurate data. Quality and accuracy don't come cheap but are worth it in the long run.
If you were closer I would give you the Oehler. Good luck with your search.

I am continually astounded at how quickly people make up their minds on little evidence or none at all.
Jack O'Connor