What's reasonable price to you? <$50? Amazon has a few under 50. Check out Hanna Champ from Hanna or PH-80 from HM Digital.
I used this soil test kit and it was fairly accurate, I have since upgraded to an electronic pH reader.
I use this one and like it alot. Calibrated to adjust to temp as well. Oakton EcoTestr pH 2 Waterproof pH Tester, -1.0 to 15.0 pH Range: Amazon.com: Industrial & Scientific
Yes, you are going to need a couple. 7.0 Buffer, 10.0 Buffer and conductivity solution. Always! rinse your pen after doing fert water test, it will make your tip last longer. They sell a storage solution but after I ran out I havent had a problem not using it (storage solution) so I just rinse with my tap water which is straight up 7.3 ph so almost as good. All used in calibrating your pen (Meter). Instructions included suck but after u do it a couple of times it's easy. I am in municipal style water treatment so mine get's a workout. DO NOT STORE DRY! AND LIGHTLY TOOTH BRUSH ELECTRODES EVERY ONCE IN A WHILE Peace
This is the version I have - overkill for growing but I use it for work too. Oakton PCSTestr 35 Waterproof Multiparameter Tester, For pH, Conductivity, TDS, Salinity and Temperature, 0.0 to 14.0 pH Range Buy new: $165.00 Amazon.com: Oakton: Industrial & Scientific