Let me put it like this - No!
If you fancy yourself against the table and you"re well-placed in chips, why give it away? I generally hate deals (or giving something to the bubble) and always refuse either unless there it is an overwhelming reason to agree to it. They seem to me to be the antithesis of tournament poker where the concept is to beat the others to a pulp and then all of a sudden at the FT people get all wimpy and want to lock up something at the expense of a possible bigger win. I see people taking the safe option all the time instead of backing themselves to take it down - don"t understand it. Fair enough if you"re very deep for megabucks against some really tough players but, in your local casino, you are probably one of the better players, so why not back yourself? In the instance you give - a 10-handed deal - you"re having a laugh. I wouldn"t have given them the option you did but if they wouldn"t accept your proposal, I hope you made them play on.