Called them out for a clogged A/C drain line. The ...

Called them out for a clogged A/C drain line. The guy was here 20 minutes and charged me $350 to clean it out!!!! He then said the line was dirty and he would have the HVAC guy come out and check my system and give me estimates for any repairs need. 5 minutes after he left the office was calling me telling me a tech would be coming out and that they offered financing would I be interested in that? Ummmm, financing for what ? The HVAC tech hadn't even come out yet so I knew when he put the carriage before the horse They were going to recommend a new system whether I really need one or not. Sure enough new system needed at $24-$34,000!!! All I had was a clogged drain line and A/c is working! Why would i replace a working system and for that amount?Crazy!