The one I have now (second one) is close to ten years old and ragged out. Just called them up to order placement burners, flavor bars and a starter. They told me my unit is still under warranty because it's under 10 years old and they are sending the parts for free. I was on the verge of buying a new one but decided to rebuild this one to try to save a little coin. Cannot beat Weber...
It's really about $50-70 in parts (their wholesale); really cool they honor that warranty 10 yrs out. It's why they are expensive.
Installing burners & starter might take you all of 30 minutes - WAY less than going out to buy another grill and assembling it. Have some extra tie-wraps to re-attach any of the igniter wires you need to move around for access. The tiny ones are all you need
If it's the electric starter box they sent (that sends the juice to the igniters), you MIGHT need new igniters, as well. Those may be under warranty, or you can get them fairly cheap. They come with the wires/connectors, and you will need to re-route those and re-attach with tie wraps to keep them from coming loose.
When you install the new starter box, you should check each igniter is working before running the gas to each of the burners, visually, or try starting each burner individually. If you turn them all on, and one igniter isn't running, you'll get gas buildup that'll make a big 'poof' when the bad one eventually ignites
There ain't many "moving parts" in a grill that require anything more than a screwdriver & some snips (to detach wiring) to fix up.
Other handy upgrade is one of those in-line propane tank level indicators, that are like $10 at Home Depot, if your grill doesn't have a spring-weight indicator.