Book appointments with several real estate agents and have them visit the property in person. After they have taken notes they can incorporate current market conditions into a personalized CMA (comparative market analysis) to give you their professional opinion of price as well as suggestions on what price to market the property at once/if you decide to officially put it on the market.
Depends on the location of the property, as well as size. The average two bedroom condo in Chicago will probably cost you $350 to inspect, but that could range from $250 - $475. Make sure your inspector is licensed. The best inspectors generally come from referrals.
Just make sure you are giving the tenant 48 hours notice and only conduct showings between 8 am - 8 pm. Best of luck!