passed ccna now on to voice, lab question

Is there a simulator I can use or is it only real equipment. My budget is extra tight right now. I ve been in the TDM world for a long time. At present work on a Nortel CS2100 TDM/voip large carrier grade switch. So no real Cisco voip to play with a work. Ive seen ccna voip labs on ebay for around $500 not sure what I'm getting. thoughts and help.
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Phil 4:6 "Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God."
Phil 4:6 "Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God."
Comments
Another decent option is Online rack rentals. CCIE Voice Rack Rental Vouchers | IPexpert Inc. I know that it is for CCIE but the CCNA Voice touches on CUCM, Unity Connection, Presence & CME. This rental has all those components. You can't beat $25 for an 8 hour session either!