The registration for a domain name I want is expiring soon. (I know it won't be renewed because it has remained undeveloped for many years.) I don't want to contact the domain name registrant or the registrar (Network Solutions) in advance of expiration because the price might go up and I won't spend more than a few hundred dollars.

Who can I trust to reserve the domain name in advance of expiration so that I am first in line to get it when the current registration expires? (I am willing to pay a reasonable fee for this "reservation".)

Thanks in advance for any advice.