I did a quick search, I think the 200K is only applicable to wholesale (corporate?) bonds.
https://secure.fundsupermart.com/fsm/advice-services/faq/341/
Yes you can. Wholesale Bonds are available to either Accredited Investors (AIs) or anyone who transacts a minimum investment amount of at least SGD 200,000 (or its equivalent in foreign currency) in a single order. However, do note that some bonds are only available for Accredited Investors (AIs).
OK, additional further digging. No min for sell, so it looks like I can sell on FSM easily once I custodize with them.
https://secure.fundsupermart.com/fsm/advice-services/faq/1895/
Bond Express aims to provide clients with a real-time bond trading experience for a specified list of wholesale and retail bonds, where bid/ask prices shown are firm and executable. These prices are available for immediate bond trade execution by our clients at the available bid/ask volumes where iFAST Financial Pte Ltd (“iFAST”) deals as principal for all Bond Express trades.
Via Bond Express, clients are also able to trade in odd lots (smaller denominations than the Intended Denomination) from as low as 5,000 lot sizes. However, for wholesale bonds, odd lot investments via Bond Express will be applicable for Accredited Investors only. Non-accredited investors can also purchase wholesale bonds via Bond Express but will have to conform to the standard minimum investment denomination for each bond, subject to an investment value of at least SGD 200,000, or its foreign currency equivalent for non-SGD bonds.
There is, however, no restriction on clients’ sell actions via Bond Express.
I logged into bond express and see my bond bid / ask price.
104.3 (sell) / 104.65 (buy)
min size 1000