I had a blue lab combo meter for some years -- bought it in 2012 -- and it served me well. The ec probe cord broke -- it needs better strain relief -- after 5-6 years and I was using it as a ph meter for a while. When the probe died, I decided to switch to a new meter instead of buying a new probe.
When you look up the specs, the accuracy is meh (+ or - 0.1 pH accuracy with 0.1 pH resolution) for the price, and I was buying a new probe at least once every two years, so when you add in the probes the total cost of ownership goes up. Probes bluelab sells are sealed/non-refillable so they are considered disposables as eventually they will get contaminated. You would need to switch to refillable probes to avoid this but they come with their own issues (maintenance, proper usage, a little more fragile).
I switched to a lab grade portable meter -- a new old stock Denver Instruments portable meter UP-25 (+ or - 0.01 pH accuracy with 0.01 pH resolution. If I were going to buy a new one I'd get a hanna instruments, something under their professional line (up to 0.002 accuracy with 5 point calibration) or just get their Groline models (+ or - 0.02 pH accuracy and 0.01 pH resolution) given its better than bluelabs. The Groline probes cost a bit more to replace as they are combo probes -- something to keep in mind. Probe cost is why I'd rather pay more for a meter than takes different probes vs a meter that has a multiparameter probe but I do understand the convenience of one probe to maintain/replace vs multiple.
I consider Hanna to be on-par with Hach, YSI, Sartorius (these are the people that bought Denver Instruments, the company that makes the meter I use). Bluelab not so much.
If you're willing to take the chance, a lot of the scientific meters pop up on eBay from time to time, most of which just require a new probe. Just keep in mind the connector format the meters use. I've noticed BNC losing popularity to proprietary connectors -- likely to force you to buy their probes instead of being able to shop around. The money is definitely in the probes.
Some people argue "you don't need all that accuracy!!!" w/e, I want it if I'm going to be in these price points... Not to mention I rather pay for a reliable, trustable tool. You drop $600 now and forget about it in some months but you'll appreciate having the nice meter every use.
TLDR; Hanna Instruments HI98191