For a Fluke 187/189, I don't think I would just automatically buy a new elastomeric connector (aka "zebra strip") especially if on a budget. While it is possible that any such connector from any brand or model could develop a problem leading to dim or missing segments on the display, the only ones I'm aware of that had a chronic problem were the early 80-series Flukes. Even then, a good cleaning usually restores functionality.
As for the price, it's your call. All I can say is, it is a good multimeter, one of the best Fluke ever made IMHO, so it's very much worth repairing for that price. Good condition used 189s go for USD200+ on eBay.