Prices are not allowed ,please see the rules.
That said ,yours are very high,IMHO.
What brand and contractor.
Your duct sytem is likely undersized ,which would account for the sweating and greater then normal temperature drop.Whoever you use should check the static pressure of the duct system,if you only need 4 tons ,very possible in your area,the duct system may be large enough.
If teh 7/8" is a short piece ,I don't think it's a problem,contactor may or may not be going bad,also very hard to tell how much longer the accumaltor will last,have to see it .
You are located near our shop,I can tell you that if this call was the result of being phone solicited,definately get a second opinion.
Chances are your system is a 10SEER ,and if the duct are undersized and they get corrected ,you'll save a lot by replacing.