Check all main functions are working well, no cracks of any sort on the body, no LCD bleed for the LCD panel. Check the AF works, mirror is clean, light seals are alright. These are recent film SLR models, so you shouldn't run into major problems.
For piece of mind, make your way down to reputable second hand stores like TCW, P&G and the like. Most can be found at Peninsular Shopping Center, next to Funan. Ruby is located at Peninsular Shopping Center as well, so after you've picked up your camera, you can head down there to get some film to start shooting!