Reddit mentions of Yamaha YHT-4910UBL 5.1-Channel Home Theater System

No, this is not BS. Those speakers are made to work with only that receiver in mind, and vice versa. You might be able to find just the receiver/blu-ray player on ebay/craigslist somewhere, but you've also got to make sure that both the impedances match up. Also, the new receiver would need to have the same type of speaker adaptors as the old system. (this wouldn't be easy to find)

However, I would highly suggest not going this route. This is why HTiB's are rarely a good investment, due to the lack of upgradeability. To make sure you don't find yourself in the same situation in a couple years, invest in a legit home theater kit. You can start with something as basic as this Yamaha. Systems like these are great starter kits, since they are still about the same price as a decent HTiB, but also are much more future-proof. Then just add on any Blu-ray you'd like, ($75-$90). If any part ever breaks or becomes obsolete, or you'd like to upgrade something down the road, you can just replace the one piece, rather than the entire system.

I am selling a few electronic items that are in like new condition for good prices.

I've got:

• A Model YHT-497 Yamaha 5.1 Channel Home Theater in a Box System. Comparable model new for $430, selling for $350. 100W per channel and the sub has a satisfying kick, discrete receiver, sub, and speakers so they can be upgraded separately down the road. Comes with a decent roll of cheap speaker cable.
  
  
• An ARRIS/Motorola SURFboard DOCSIS 3.0 Cable Modem, Model SB6121. New for $69, selling for $50. This has a three star certification for use with XFINITY internet services which is the highest and most thorough level of testing they do.
  
  
• A Netgear Wireless Router w/ Dual Band Gigabit, Model R6300-100NAS. New for $150, selling for $120. This thing's just fucking great. I've never had any complaints about Comcast's service, and I think this guy (recently paired with the SURFboard) is the main guy to thank for that. I think I've had to reset it maybe once or twice ever.
  
  
• Official PS3 Wireless Stereo Headset w/ USB Wireless Receiver, Model CECHYA-0080. New for $100, selling for $75. These are big bulky headphones with a microphone attached. Nice sound quality, though I'm sure audiophiles would disagree.
  
  
• Monoprice speaker stands, set of 2. New for $15-20, selling for $10. These things are flimsy but they'll hold your small speakers off the ground just the same.
  
  Now, you're probably wondering why I'm willing to part for such like new items at such discounts. The reason is that there was a fire a month and a half ago in my old building and these were affected by the humidity and/or smoke to varying degrees. But they're all back from the Electronics Restoration Service, who tested, restored, cleaned, and deoderized each individual component before testing them again to ensure proper function. I then tested each item when I resumed possession of them.
  
  But, because of a gap in communication between the ERS guys and my insurance claim rep, getting these things back took over a month, and in the meantime I had replaced my sound system and internet devices. I'd hoped to be able to return them within the Best Buy returns timeframe but things dragged on too long. The speaker stands I don't need because in my new place I've mounted my rear speakers on the walls. The PS3 headset I don't need because my PS3 didn't make it through the ordeal. The 360 below it and the TV above it did, though, and both work fine as a testament to these guy's abilities.
  
  Related to that I guess I also have a couple other things for sale:
  
  
• A slew of PS3 games. No PS3 anymore and I'm not sure I'll replace it so these are for sale. All barely affected by the incident but still individually cleaned by the guys at ERS. Let me know if you're interested in something and I'll figure a price.
  
  
• 2 PS3 Controllers, one black and one white. Note that they did not try to restore or clean these at all since the system was shot. You can test them and we can figure out a fair price if you're interested.
  
  So yeah. Like new, restored items for good prices. Who's interested?