Old RM 1 Coins

I don't know how many of you still remember these old one Ringgit coins. My late father loved to collect and keep the new ones in huge cracker cans. Sometimes he also stored them in tea dust cans or even tobacco cans. He passed away in 2003 but my mom just found 30 of them stashed away in a small tobacco can when she was cleaning her bedroom last month! She asked me if these coins can still be traded. Since I had no immediate answer, I took them home and showed them to the bank workers. They did not have an answer to my question either but they suggested that I bring the coins to the Central Bank in KL. I wonder if any coin collectors out there want to buy them from me.