Yes that's my understanding. If a holding for MBK Rights (code: MBKR) is showing up in your portfolio holdings on your broker site you can sell these rights on market. I notice a few have sold @ .002 today but for an immediate sale you would have to meet the highest bidder offer with a 'limit' sell order @ .001.
What you would be selling is not shares, what you would be selling is your rights to acquire a number of shares through the rights offer. Whoever buys your rights intends to exercise those rights by subscribing for shares equal to your number of rights @ .008 in the offer. You would be transferring your rights on market for .001 per right.
You could join the queue by putting a sell order in "at market' or a imit order of say .002. and wait to see if someone bites over the next few weeks. But to get an immediate and certain sale you would have to meet the current offer @ .001.
Alternatively you could take up your rights, pay by Bpay, @ .008 per share when you receive the personalised entitlement offer and your rights would convert to shares in your holding.
Or you could do nothing and let your rights lapse.
Have you read the rights prospectus announcement?