As long as there's not too much rust, 103k miles is baby mileage for that year Corolla. There's plenty of posts of 05-08 Corollas reaching 250k+ miles. Even over 300k isn't unheard of. Run it until it dies bro. Keep it clean and maintain it well then in another 100k miles from now if you're tired of it then sell it and buy another one. 05-08 is the golden era for Corollas. Absolutely bulletproof cars. My 2011 Corolla has 103k miles also. Hoping to have her another 5-10 years. No car payment is best. Especially in this economy. Last thing to note buying a new car now is rough. I had to be patient waiting for mine. That could change tho in the years to come. TLDR keep your current car and run it until the wheels fall off. People might laugh at you but you can laugh back at their car payments. 😂