The highest valued domains are typically acquired for commercial use.
Just Google "Pacemaker" and you will quickly see that it's mostly education about pacemaker devices - not much commerce going on at all.
It looks like most companies that produce pacemakers are B2B, so it would stand out for their clients being Pacemaker.com. It's memorable, and describes their business... if that is their sole business.
For me it's a vanity for any company involved in pacemakers, but not one that will give a significant commercial edge.
There is a sucker born every day, and I doubt while dealing with corporations you will find another Milo that has a unilateral decision making process without checks and balances.
I've had domains that were the most perfect goddamn domain for a business (we all have). The CEO approves, the COO approves, then some dipsh:
:t "web guy" swoops in and nukes the transaction.
Selling this domain is going to be like that. You might be able to double your money, but I think a windfall for this one is doubtful.
Either way, good luck Richard.